Moisturebroof envelope or wrapper



Nov. 26, 1929. w. E. MOLINS 1,

MOISTUREPROOF ENVELOPE 0R WRAPPER Filed April 5, 1928 Patented I Nov. .26, 1929 UNITED STATES.

PATENT OFFICE-T WALTER EvnRETT norms, or nnrrrormf LONDON, ENGLAND MOISTUREBROOF ENVELOPE R WRAPPER Application filed April 5, 1928, Serial No. 267,774, and in Great Britain Apri1 29, 1927. i

This invention is for improvements in or relating to moisture-proof envelopes and re-' pregnated with wax, but such wrappers have to the distinct disadvantage that they are easily soiled bydust and dirt, besides being very unpleasant to handle I i Further,'inwrappers of this character, the overlappin edges are sealed by melting the wax and, a lowing the same to cool, which method does not provide a very secure joint and consequently the moisture-proof proper ties of the envelope are very easily destroyed. In view of thedisadvantages enumerated 2-19. above, impregnated wax wrappers are not used to any considerable extent commercially, and yetit is an undoubted fact that a wax covered wrap er is an extremely suitable moisture-proofmaterial for covering arti-- cles such as cigarettes where the contents have to be proteo tedagainst climatic condi-.

tions which are liable to interfere seriously with the quality or conditions of the cigarettes.

- an lit is an object of the present invention to provide a moisture-proof wrapper particu-- larly for usein'enveloping articles such as cigarettes easily affected by climatic conditions, which will permit the overlappin edges of the wrapper to be securely seale together'by means of gum or a like adhesive,

and yet maintain the outer surface of the wrapper smooth so that it-does not pick up dirt or dust and et possess a moisture-proof inner surface wh ch protects the wrapped articles against varying climatic conditions.

The present invention consists of a moistore-proof envelope wherein the whole of the inner surface is provided with a coatin ofwax applied to one side of a wrapper rom which the envelope is formed in such a man-' ner as to leave those portions of the waxed.

side of the wrapper whichehave to be secured by adhesive to ortions of the unwaxed .1 side of the wrapper, cc of wax.

A provided with a covering of wax for the purpose hereinafter set forth. v

The invention is more particularly described with reference to the accompanying drawings, in which 1 Fig. 1 shows-a side elevation of a box covc ered with a wrapper made according to this invention.

Fig. 2 shows a wrapper blank of the kind described in specification No. 259,165 but coat- I ed with wax in the manner herein described.

Fig 3 shows ablank of the kind described in specification No. 21,7 of 1927, sin1ilarly coated. I

Fig. a shows the reverse side of the blank 1 illustrated in- Fig. 1, when the same has wax 0 applied upon. those portions thereof whlch provided with a coating of wax which does not extend across the full width of the wrapper, thus leavinga margin 2 on either. slde thereof for a' purpose hereinafter set forth.

,The wrapper so coated maybe employed to envelop a rectangular packet of cigarettes in a U-shaped block ended envelope so that the unwaxed narrow margin 2 formed at each side of the wrapper is arranged to overlie a portion of the unwaxed side of the wrapper and be secured thereto by any suitable adhesive as shown at Fig. 1. The end of the block ended envelope is folded inwardly so as to form two side folds and the'two broad end flaps are folded so that the flap provided on its inner surface with the unwaXed section 1 is arranged so asto constitute thelast foldedfiap of the wrapper, and this flap is folded and secured by. any suitable adhesive to'the 1111-.

. waxed surface of the other broad end flap or ering is provided for a packet of cigarettes having an inner coating of wax and that the only possible parts of the covering at which the same is not entirely moisture-proof occurs between the interstices formed between the overlapping folds of the wrapper at the open end thereof, and at the side tucks formed near the block end of the wrapper.

If necessary; the wrapper may be completely sealed by applying to the unwaxed side I; (Fig. 3) of the wrapper three sections of wax 3-, 4 and 5 along each side edge of the wrapper as shown in Fig. 3 so that the said sections of wax occur substantially at each end and at the central section of the wrapper. It will be found that by applying wax in this manner the interstices between the overlapping folds of the wrapper will be filled with wax which, as the enveloped packet passes through a heater, melts and thereafter cools to form amoisture-proof seal between the side folds and end tucks of the wrapper, thus rendering t e envelope entirely moisture-proof and protecting the; enveloped articles against variable climatic conditions.

It will be observed by reference to the drawings that a narrow margin 3 is shown at either end of the blanks. This mar 'n is one half of a narrow uncoated strip le t between each blank when the blanks are printed from a web, fed from a reel. The narrow strip is left uncoated between each blank so material, and having waterproofing material on such portions only of the outer surface In testimony whereof I hereunto afl'ix my signature.

WALTER EVERETT MOLINS.

that the cutting knife may operate without clogging.

By enveloping articles in a transparent wrapper treated in the manner hereinbefore set forth it is possible to eliminate the provision of a more expensive moisture-proof wrapping" and in this way considerably reduce the cost of the'article, besides materially increasing the moisture-proof properties of the wrapper.

What I claim as my invention and desire to secure by Letters Patent is 1. A moisture-proof blank for completely encasing an article, said blank having portions designed to overlap other portions of the blank when the latter is applied as a wrapper to an article, such blank having that portion only of the inner surface thereof which does not overlap the outer surface when finally applied coated with waterproofing material.

2. A moisture-proof blank for completely encasing an article, said blank having por-' tions designed-to overlap other portions of the blank when the latter is applied as-a wrapper to an article, such blank having that portion only "of the inner v surface" thereof which does not overlap the outer surface when finally applied coated" with waterproofing. 

